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Michael A. Stecker
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Sh2-101: Sharpless 101 and Cygnus
X-1
file: Sh101-180sX42AP130f4d7P2-7202023-cr2.jpg This red emission nebula Sharpless-101 lies in the constellation Cygnus. Next to the brightest of two stars at the lower left is a strong x-ray source called Cygnus X-1. The mass of the unseen companion is significantly larger than 5 solar masses suggesting it is a black hole -- the first one mentioned by astronomers. I used an Astro-Physics 130 mm f/6 triplet refractor focally reduced to f/4.7 with exposures of 180 seconds X 42 (126-minutes) and an Optolong L-eNhanced nebular filter. .
The Cygnus X-1 story:
https://www.astronomy.com/science/cygnus-x-1-the-black-hole-that-started-it-all/ Photographic Data telescope: Astro-Physics 130 mm (5.1-inch) f/6 triplet refractor focally reduced to f/4.7 (FL= 616 mm)
mount:
ZWO AM5 harmonic/strainwave Mount Guide Settings in Asiair Plus: Calibrate Step: 5,000 ms Dec Duration: 3,000 ms RA Duration: 2,000 ms Aggression: 50% for both RA & Dec Exposure time for guiding: 1 second
Guiding hardware:
SVBony 60 mm f/4 guidescope (fl=240 mm) Guide Camera: ZWO ASI662MC color planetary camera (2.97 micron pixels) controller/computer ZWO Asiair Plus via WiFi to Samsung S7+ tablet . imaging camera: ZWO ASI533MC-Pro one-shot color astro-camera cooled to 14-degrees F with Optolong L-eNhanced nebular filter . exposures: 180 seconds X 42 (148-minutes or 2.1 hours)
processing
Stacked in Asiair Plus and cropped and post-processed in Adobe Photoshop Elements . photographic site: West Los Angeles http://mstecker.com/pages/chhouses_fp.htm (Bortle 9 light polluted sky) |
